You may know of this by it’s common name, “fuzzy” logic. I prefer the term “fractal”, because it gets to the heart of the matter. We don’t have fuzzy dimensions, but we do have fractal dimensions. Fractal dimensions are “fractional” dimensions like 1.2 and 2.3. Likewise with “fuzzy” logic. As opposed to the binary logic of 0 and 1, fractal or “fuzzy” logic allows for a range of values between 0 and 1. You won’t hear anyone talk about fractal logic, though. I use the term here merely for visualization purposes. (When I am trying to understand something, I often find it helpful to rename the ideas, change the metaphor, redraw the picture for myself).

So what it is good for? What can we use this funny logic for? That’s simple. We all know that there are degrees of truth. The world ain’t black and white, you know. Take a glass of water, for example. Is it empty or full? Binary logic cannot answer this, but according to fractal logic, the “truth value” of the emptiness or fullness of the glass is easily calculated, sort of like a percentage.

Binary logic deals with true and false values while fractal logic tries to address “degrees” of truth in values such as hot-cold, where you have a continuum of values between extremes.

Here is a logic tutorial I found interesting:

http://logictutorial.com/

I need more example to flush this out. How is fuzzy logic NOT just statistics (percentages)?

“Ever the winds blow; ever the grass grows. Every day, men and women, conversing, beholding and beholden. The scholar is he of all men whom this spectacle most engages.”
Ralph Waldo Emerson, "The American Scholar"

The practice of Centering Prayer is basically a waiting upon God with loving attentiveness, fulfilling the Gospel injunction, “Watch and Pray.” If one can accept the notion of prayer as primarily relationship with God, it becomes obvious that one’s relationship with God can be expressed without words, simply by a gesture or even by one’s silent intention to consent to God’s presence.

"What amazed and upset him most of all was that the majority of people of his age and circle, who had replaced their former beliefs, as he had, with the same new beliefs as he had, did not see anything wrong with it and were perfectly calm and content. So that, besides the main question, Levin was tormented by other questions: Are these people sincere? Are they not pretending? Or do they not understand somehow differently, more clearly, than he the answers science gives to the questions that concerned him? And he diligently studied both the opinions of these people and the books that expressed these answers." - Tolstoy, "Anna Karenina"

"They do not covet truth, but victory and the dispelling of their own doubts. What they defend is some system, that is, some view about the totality of things, of which men are actually ignorant. No system would ever have been framed if people had been simply interested in knowing what is true, whatever it may be.” - George Santayana

“The old grey donkey stood by himself in a thistly corner of the Forest… and thought sadly to himself, “Why?” and sometimes he thought, “Wherefore?” and sometimes he thought, “Inasmuch as which?” and sometimes he didn’t quite know what he was thinking about.” — Eeyore